Solve the system by the substitution method. 4x+3y=7 x=y+7

y = -3 and x = 4

Step-by-step explanation:

4x + 3y = 7

x = y + 7

Since we know what x is equal, replace the x in the first equation with the second equation.

4x + 3y = 7

4(y + 7) + 3y = 7

4y + 28 + 3y = 7

7y + 28 = 7

7y = 7 - 28

7y = -21

y = -3

Now that we know y, you can use the same process to find x.

x = y + 7

x = (-3) + 7

x = 4